man sc_detect_card_presence (Fonctions bibliothèques) - Detect presence of smart card in a reader
NAME
sc_detect_card_presence - Detect presence of smart card in a reader
SYNOPSIS
#include <opensc.h>
int sc_detect_card_presence(sc_reader_t *reader, int slot_id);
DESCRIPTION
This function checks whether reader has a card present inslot_id.
RETURN VALUE
If an error occurred, the return value is a a negative OpenSC error code. If no card is present, 0 is returned. Otherwise, a positive value is returned, which is a combination of flags. The flag SC_SLOT_CARD_PRESENT is always set. In addition, if the card was exchanged, the SC_SLOT_CARD_CHANGED flag is set.